We recently came across a customer who wanted 1. Partners to single sign on to salesforce via B2C identities(salesforce is the SP) 2. Manage salesforce identities using B2C. Note that (1) is different from using Salesforce as the IdP behind B2C. In this case salesforce is the SP(service provider) and B2C is the IdP(identity provider). For (2) they preferred JIT creation and updating of users. Salesforce does support OIDC auth providers. One tricky area in integration is that